Date: 10/11/18 3:13 am
From: Amy Davenport <cobussec...> [cobirders] <cobirders-noreply...>
Subject: [cobirders] Colorado Rare Bird Alert for October 11, 2018
Hello cobirders

Our report is called Rare Bird Alert because search engines find it
better. The report is really "Uncommon Bird Report" Not all uncommon
birds are rare birds. Birders may want to know where to see them anyway!
Without being a member, "cobirders" can be read at:

Report Uncommon Birds at: 303-324-7994 or

NOTE: Reports do not confirm sightings. Choose to chase at your own risk
and expense.!
NOTE: To reduce length of report, only recent sightings listed; visit
Colorado Birding Society's website everyday for additional sightings!

Reports added: 10/10/2018
Arapahoe (Western Gull)
Boulder (Parasitic Jaeger, Lesser Black-backed Gull, Red-necked Phalarope,
Palm Warbler, Pectoral Sandpiper, Eastern Phoebe, Magnolia Warbler,
Chestnut-sided Warbler)
Jefferson (Tropical Kingbird)
Jefferson/Douglas (Sabine's Gull, Common Loon)
Larimer (Common Loon, Cassin's Kingbird, Sage Thrasher, White-throated
Mesa (Pinyon Jay, Sagebrush Sparrow, Pinyon Jay, Gray Flycatcher,
Townsend's Warbler, Chestnut-sided Warbler)
Montrose (Williamson's Sapsucker)
Weld (Short-eared Owl)


Adams County
++++Rocky Mountain Arsenal
Common Loon --Lake Ladora (south) (Orien Richmond) last 10/8
Cassin's Kingbird --Lake Ladora (south) (Orien Richmond) last 10/8
++++Barr Lake
Gray-cheeked Thrush --see map (Bez Bezuidenhout) reported 10/8

Arapahoe County
++++Aurora Reservoir
Western Gull (1st cycle) (Mlodinow:Ely/Diane Roberts) (first 10/7) last
Bonaparte's Gull (Stevens) (first 10/8) last 10/9
Mew Gull (Stevens) first 10/8

Boulder County
++++Lagerman Reservoir
Parasitic Jaeger (Peter Burke/Stevens:Michaels) (first 10/6) last 10/10
Lesser Black-backed Gull (Peter Burke/Stevens:Michaels) (first 10/6) last
Red-necked Phalarope (4) (Steve Frye/Stevens:Michaels) (first 9/29) 2;
last 10/10
++++Tucker Gulch Trail
Palm Warbler (2) (Tim Mitzen:Lindsay Purifoy) first 10/10
++++Prince Lake #2
Pectoral Sandpiper (3) (Ted Floyd) first 10/10
++++Golden Ponds
Eastern Phoebe (David Dowell) first 10/10
Magnolia Warbler (David Dowell) reported 10/10
++++Ryssby Church & Cemetery
Chestnut-sided Warbler (David Dowell) (first 10/9) last 10/10
Townsend's Warbler (David Dowell) first 10/9
++++Mayhoffer-Singletree Trail
Cassin's Vireo --east section to stone benches (Peter Ruprecht) first 10/9
++++Walden Ponds
Pectoral Sandpiper (Pheneger:Zmolek/Bill Kaempfer) (first 9/24) 1; last
Vermilion Flycatcher (male) --east/ Cottonwood marsh parking lot (Peter
Burke/David Leatherman) (first 9/29) last 10/8
++++Coyote Run Open Space
Lewis's Woodpecker (Ryan Bushong) (first 10/7) last 10/9
++++Old St. Vrain Road & Area

Huerfano County
++++County Road 230
Eastern Phoebe (David Tonnessen) first 10/8
Sage Thrasher (David Tonnessen) first 10/8
++++Lathrop State Park
Mexican Duck (Tonnessen) reported 10/8

Jefferson County
++++South Platte Park Reservoir & Area
Tropical Kingbird (Frank Farrell:Michael Lester/David Suddjian) (reported
10/5) last 10/10
(Seventh State Report, possible 2nd State Record)
++++Harriman Lake Park
Swamp Sparrow (Mark Chavez) first 10/9

Jefferson/Douglas County
++++Chatfield Reservoir
(NOTE: see directions on construction updates)
Sabine's Gull (Michael Lester/Matthew Wistrand) (first 10/5) 2; last 10/10
Common Loon (Dean Shoup/Wistrand) (first 10/7) last 10/10

Larimer County
++++Cobb Lake Wildlife Area
(See Directions for Access)
Common Loon (Jacy Bernath-Plaisted/Andy Bankert) (first 10/5) last 10/10
Cassin's Kingbird (Nick Komar:Andy Bankert/Bankert) (first 10/7) last
Sage Thrasher (Komar:Bankert/Bankert) (first 10/4) 2; last 10/10
Kingbirds (possible Cassin's & Couch's) (Andy Banert:Nick Komar/Jay
Breidt) (first 10/7) last 10/8
Drive 0.5 miles north on CR 3 from CR 56 to search for Kingbirds)
++++Greyrock Commons Trail
White-throated Sparrow (Doug Swartz) (first 9/26) last 10/10
++++Strauss Cabin area/Rigden Reservoir
Common Loon (Komar:Wade/Lori Zabel:Robert Beauchamp) (first 10/7) last
++++Horseshoe Lake
Bonaparte's Gull (2) (Nick Komar) first 10/8

Weld County
++++Wellington Wildlife Area
Short-eared Owl (Stevens:Michaels) first 10/10
++++Union Reservoir & area
Common Tern (Steve Mlodinow) (first 9/15) last 10/9


Prowers County
++++North Gateway Park
Pectoral Sandpiper (Leukering) first 10/9


Clear Creek County
++++Idaho Springs (2821 Riverside Drive)
Long-eared Owl (Matthew Wistrand) first 10/8
Black-throated Blue Warbler (Matthew Wistrand) reported 10/8
Townsend's Warbler (Wistrand) first 10/8

La Plata County
++++Pastorius Reservoir
Cassin's Vireo (James Beatty/Susan Allerton) (first 9/25) last 10/8
Pectoral Sandpiper (Allerton) last 10/8

Mesa County
++++McInnis Canyons
Pinyon Jay (2) (Jasdev Imani) first 10/10
Sagebrush Sparrow (2) (Jasdev Imani) first 10/10
++++Glade Park
Pinyon Jay (25) (Eileen Cunningham) first 10/10
++++Grand Junction Wildlife Area
Gray Flycatcher (Carol Ortenzio:David Price/Katey Buster:Cary Atwood)
(first 10/9) last 10/10
Townsend's Warbler (Adam Cupito) last 10/10
Sage Thrasher (Henwood:Moffatt) first 10/5
++++Connected Lakes State Park Area
Chestnut-sided Warbler (Carol Ortenzio) (first 10/8) last 10/10
Nashville Warbler (Adam Cupito) (first 10/2) last 10/9
Townsend's Warbler (Adam Cupito) (first 9/19) 2; last 10/9

Montrose County
++++Nucla Town Reservoir
Williamson's Sapsucker (Coen Dexter:Brenda Wright) (first 9/16) last 10/10
++++Nucla Sewer Ponds
Townsend's Warbler (Dexter:Wright) first 10/8

Park County
++++Spinney Mountain
Semipalmated Plover (4) (David Tonnessen:Jim Merritt) first 10/7
Lesser Black-backed Gull (Tonnessen:Merritt) first 10/7
Sage Thrasher (Stevens/Tonnesse:Merritt) first (first 10/2) last 10/7
Northern Mockingbird (Tonnessen:Merritt) first 10/7

Rio Grande County
++++Monte Vista National Wildlife Refuge
Sage Thrasher (Glenn Gade) first 10/8

Teller County
++++Manitou Lake
Lewis's Woodpecker (Scott Chalmers/Tonnessen:Merritt) (first 10/1) last

Good Birding!

Directions to birding spots and s on CoBus website:

Amy Davenport, Secretary, Colorado Birding Society Denver, CO
Contact CoBus/Report Interesting Birds: 303-324-7994
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